If each activity is scheduled for exactly two days of the week, in how many ways can the activities be scheduled?

The activities during the week can be scheduled in the following three different ways:
(i) Filling, Watering , Filling, Rolling, Watering, Rolling
(ii) Filling Filling, Watering, Rolling Watering , Rolling
(iii) Filling, Filling, Rolling, Watering, Rolling, Watering